PNG re-work: handle libpng 1.5 correctly
[imager.git] / PNG / Makefile.PL
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1#!perl -w
2use strict;
d24404be 3use ExtUtils::MakeMaker;
1d7e3124 4use Getopt::Long;
b515cc4c 5use Config;
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6
7my $verbose = $ENV{IM_VERBOSE};
8my @libpaths;
9my @incpaths;
10
11GetOptions("incpath=s", \@incpaths,
12 "libpath=s" => \@libpaths,
13 "verbose|v" => \$verbose);
14
15our $BUILDING_IMAGER;
d97c8dbd 16our %IMAGER_LIBS;
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17
18my $MM_ver = eval $ExtUtils::MakeMaker::VERSION;
19
20my %opts =
21 (
22 NAME => 'Imager::File::PNG',
23 VERSION_FROM => 'PNG.pm',
24 OBJECT => 'PNG.o impng.o',
30160513 25 clean => { FILES => 'testout' },
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26 );
27
28my @inc;
29if ($BUILDING_IMAGER) {
30 push @inc, "-I..";
b515cc4c 31 unshift @INC, "../lib";
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32}
33else {
b515cc4c 34 unshift @INC, "inc";
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35 print "PNG: building independently\n";
36 require Imager::ExtUtils;
37 push @inc, Imager::ExtUtils->includes;
38 $opts{TYPEMAPS} = [ Imager::ExtUtils->typemap ];
39
40 # Imager required configure through use
4b2e59d3 41 my @Imager_req = ( Imager => "0.86" );
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42 if ($MM_ver >= 6.46) {
43 $opts{META_MERGE} =
44 {
45 configure_requires =>
46 {
47 @Imager_req,
48 },
49 build_requires =>
50 {
51 @Imager_req,
52 "Test::More" => "0.47",
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53 },
54 resources =>
55 {
56 homepage => "http://imager.perl.org/",
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57 repository => "git://git.imager.perl.org/imager.git",
58 bugtracker => "http://rt.cpan.org/NoAuth/Bugs.html?Dist=Imager",
b515cc4c 59 },
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60 };
61 $opts{PREREQ_PM} =
62 {
63 @Imager_req,
a5919365 64 XSLoader => 0,
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65 };
66 }
67}
68
69require Imager::Probe;
70
71my %probe =
72 (
73 name => "PNG",
cac1147d 74 altname => "Generic",
9b4036f7 75 pkg => [ qw/libpng15 libpng14 libpng12 libpng10 libpng/ ],
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76 inccheck => sub { -e File::Spec->catfile($_[0], "png.h") },
77 libbase => "png",
78 testcode => _png_test_code(),
79 testcodeheaders => [ "png.h", "stdio.h" ],
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80 incpath => \@incpaths,
81 libpath => \@libpaths,
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82 alternatives =>
83 [
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84 {
85 altname => "v1.5",
86 incsuffix => "libpng14",
87 libbase => "png14",
88 },
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89 {
90 altname => "v1.4",
91 incsuffix => "libpng14",
92 libbase => "png14",
93 },
94 {
95 altname => "v1.2",
96 incsuffix => "libpng12",
97 libbase => "png12",
98 },
99 {
100 altname => "v1.0",
101 incsuffix => "libpng10",
102 libbase => "png10",
103 },
104 ],
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105 );
106
107my $probe_res = Imager::Probe->probe(\%probe);
108if ($probe_res) {
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109 $IMAGER_LIBS{PNG} = 1;
110
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111 push @inc, $probe_res->{INC};
112 $opts{LIBS} = $probe_res->{LIBS};
03e49392 113 $opts{DEFINE} = $probe_res->{DEFINE};
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114 $opts{INC} = "@inc";
115
116 if ($MM_ver > 6.06) {
5b480b14 117 $opts{AUTHOR} = 'Tony Cook <tonyc@cpan.org>';
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118 $opts{ABSTRACT} = 'PNG Image file support';
119 }
120
121 WriteMakefile(%opts);
122}
123else {
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124 $IMAGER_LIBS{PNG} = 0;
125
1d7e3124 126 if ($BUILDING_IMAGER) {
d24404be 127 ExtUtils::MakeMaker::WriteEmptyMakefile(%opts);
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128 }
129 else {
130 # fail in good way
131 die "OS unsupported: PNG libraries or headers not found\n";
132 }
133}
134
135sub _png_test_code {
136 return <<'CODE';
137
138fprintf(stderr, "PNG: library version %ld, header version %ld\n", (long)png_access_version_number(), (long)PNG_LIBPNG_VER);
139return 0;
140CODE
141}